Xiaomi India — call from [protected] saying mi note 5 pro offers to you

I have got a call from [protected] and offering me a mi note 5 pro only in 4000. I doubt it but i said okay. She asked me for my nearest post office pin code and my address.
After few days i got a call again that my parcel are in nearest post office with the same number. And this time a guy calling to me that you have to pick that parcel and pay money for that before open it.
I denied him and he is trying to threatened to me.
Now tell me what should i do.??
I think it is fraud call and cheater call.
Beware of this type of call.